CVE-2026-20155
REST API auth check flaw exposes active sessions in Cisco EPNM.
Is CVE-2026-20155 being exploited?
Not confirmed. CVE-2026-20155 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.27% probability of exploitation in the next 30 days.
How severe is CVE-2026-20155?
CVE-2026-20155 is rated High with a CVSS score of 8.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-20155?
Yes. A fix has been recorded for CVE-2026-20155. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-20155 affect?
CVE-2026-20155 affects Cisco EPNM (Evolved Programmable Network Manager). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-20155?
Limit REST API exposure; enforce least privilege; apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated low-priv attacker can query REST API to view active user sessions, including admins, enabling potential device compromise.
Patch when possible
- affected7.1.1
- affected7.1.2.1
- affected7.1.3
- affected7.1.2
- affected7.1.0
- affected8.0.0
- affected8.0.0.1
- affected7.1.3.1
- affected7.1.4
- affected8.1.0
- affected8.1.1
- affected8.0.1
- affected7.1.4.1
- affected8.0.1.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.